| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.record.compiler; |
| |
| import java.util.ArrayList; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| /** |
| * A wrapper around StringBuffer that automatically does indentation |
| * |
| * @deprecated Replaced by <a href="http://hadoop.apache.org/avro/">Avro</a>. |
| */ |
| @Deprecated |
| @InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public class CodeBuffer { |
| |
| static private ArrayList<Character> startMarkers = new ArrayList<Character>(); |
| static private ArrayList<Character> endMarkers = new ArrayList<Character>(); |
| |
| static { |
| addMarkers('{', '}'); |
| addMarkers('(', ')'); |
| } |
| |
| static void addMarkers(char ch1, char ch2) { |
| startMarkers.add(ch1); |
| endMarkers.add(ch2); |
| } |
| |
| private int level = 0; |
| private int numSpaces = 2; |
| private boolean firstChar = true; |
| private StringBuffer sb; |
| |
| /** Creates a new instance of CodeBuffer */ |
| CodeBuffer() { |
| this(2, ""); |
| } |
| |
| CodeBuffer(String s) { |
| this(2, s); |
| } |
| |
| CodeBuffer(int numSpaces, String s) { |
| sb = new StringBuffer(); |
| this.numSpaces = numSpaces; |
| this.append(s); |
| } |
| |
| void append(String s) { |
| int length = s.length(); |
| for (int idx = 0; idx < length; idx++) { |
| char ch = s.charAt(idx); |
| append(ch); |
| } |
| } |
| |
| void append(char ch) { |
| if (endMarkers.contains(ch)) { |
| level--; |
| } |
| if (firstChar) { |
| for (int idx = 0; idx < level; idx++) { |
| for (int num = 0; num < numSpaces; num++) { |
| rawAppend(' '); |
| } |
| } |
| } |
| rawAppend(ch); |
| firstChar = false; |
| if (startMarkers.contains(ch)) { |
| level++; |
| } |
| if (ch == '\n') { |
| firstChar = true; |
| } |
| } |
| |
| private void rawAppend(char ch) { |
| sb.append(ch); |
| } |
| |
| @Override |
| public String toString() { |
| return sb.toString(); |
| } |
| } |